Thanks for the info.
I bought a Spikes Tactical 9mm and like it a lot but it has a total different style buffer and spring that are on a guide rod, kind of like a JP Enterprises style.
I was thinking about converting over another AR to 9 but was not sure about the buffer and what had to be done.
As was posted above, I know a new upper and something would have to be done about the mag well but not sure what else.
